NaCl胁迫对苦马豆种子萌发的影响及生理效应

盐胁迫是一种主要的非生物胁迫限制植物的生长，受盐害最主要的时期是种子萌发期和幼苗生长期，本文通过不同浓度的NaCl溶液胁迫苦马豆种子，研究高盐浓度下对种子发芽、幼苗生长及生理效应受到的影响。结果表明随着NaCl浓度增加,种子开始发芽的时间推迟、发芽率降低; 胚根生长量下降。在500 mmol/L浓度时，种子不发芽；各处理区随盐浓度的增加电导率越大，脯氨酸呈上升趋势。结果表明盐胁迫对细胞膜修复的抑制可能是造成苦马豆种子萌发推迟和发芽势下降的主要原因，及脯氨酸含量可能和耐盐相关。

Effects of Salt Stress and Physiological Reaction on Germination of Swainsona salsulaTaub Seeds

Salt stress is one of the most important factors limiting plant cultivation. Seed germination and seedling are markedly harmed when it is cultivated in Soil salinity.the effects of different concentrations of NaCl on the germination of Swainsona salsulaTaub seeds were studied. It was showed that the germination was delayed in higher concentration of NaCl, and the relative germination index, the relative vitality index of Swainsona salsulaTaub seeds were all decreased. And there was no germination in 500 mmol/L NaCl solution,the conductibity and content of praline in the leaf was increased in higher concentration of NaCl, it is implied that the inhibition of membrane restoration might be one of the important reasons for the postponed germination and declined germination vigor under salt stress. In addition, the content of proline might be related to the salt tolerance.